How do you increase the speed of the driven gear without making the drive gear larger?

we know the principle with gearing, ''To increase the speed of the output the driver gear is larger than the driven gear. (This will increase the speed of the output but decrease the “torque”.)
Now I have this setup. (See photo) How do you ensure that the speed of the driven gear increases without having to make the driver gear larger?
(The two gears must turn in the same direction)
3 Answer

Given the components you have shown: If you want it to turn faster without increasing the diameter of the drive gear then the only solution is to make the driven gear smaller

To increase the speed of the driven gear without making the drive gear larger, you need to adjust the **gear ratio**. The gear ratio determines the relationship between the rotational speeds of the drive gear (input) and the driven gear (output). Here are some ways to achieve this

Increase the Number of Teeth on the Drive Gear**
- If you cannot make the drive gear physically larger, you can still increase its number of teeth. This will effectively increase the gear ratio, causing the driven gear to rotate faster.
- Example:
- If the drive gear has 20 teeth and the driven gear has 40 teeth, the gear ratio is 2:1 (driven gear rotates half as fast as the drive gear).
- If you increase the drive gear to 40 teeth and keep the driven gear at 40 teeth, the gear ratio becomes 1:1 (both gears rotate at the same speed).